DisplayBase.cs

using Meadow;
using Meadow.Foundation.Graphics;
using Meadow.Logging;
using Meadow.Peripherals.Displays;

namespace CoreComputeBreakout;

public abstract class DisplayBase
{
    private MicroGraphics _canvas;
    private RotationType _rotation;

    protected Logger Logger { get; private set; }
    protected abstract IPixelDisplay Display { get; }

    public DisplayBase(Logger logger, RotationType rotation = RotationType.Default)
    {
        Logger = logger;
        _rotation = rotation;
    }

    private void CheckCanvas()
    {
        if (_canvas == null)
        {
            _canvas = new MicroGraphics(Display);
            _canvas.Clear(true);
            _canvas.CurrentFont = new Font12x20();
            _canvas.Rotation = _rotation;
        }
    }

    public void ShowText(string text, int line = 1)
    {
        CheckCanvas();

        var lineheight = 20;

        var y = 5 + (line * lineheight);

        _canvas.DrawRectangle(0, y, _canvas.Width, 20, Color.Black, true);
        _canvas.DrawText(5, y, text, Color.White);
        _canvas.Show();
    }
}